In the trailer for the sixth season of the HBO series, fans see Jon Snow's body lying in the snow and Ser Davos standing over it.

But why is Stannis Baratheon's right-hand man there? Is he paying his respects to the fallen leader of the Night's Watch or is there a more sinister reason for his presence?

Game of Thrones season 6

"Where we leave this, with Jon being dead, there’s still a few of his loyal people around that certain parties in Castle Black are not going to want to have around," Cunningham told TV Line.

"There’s a threat implicit in the thing. I’m obviously in some way about to defend or attack or whatever it may be.

However, the Dublin actor refused to comment further on the nature of that threat.

"It’s evidently still Castle Black, Ghost’s there. So there is a certain threat there, but who it comes from would be remiss of me to inform you," he said.

Kit harrington stars as Jon Snow in Game of Thrones

Jon Snow's demise in season five left fans distraught. Despite the fact that he was stabbed multiple times by his brothers, fans are speculating that he may be alive after Kit Harrington - the actor who plays Snow - was photographed on set in Northern Ireland.

However, the 29-year-old actor has tried to dodge claims that his character will somehow be resurrected.

“I had to be a dead body in Northern Ireland,” Harrington told The Sunday Times Culture magazine.

“You can’t just forget that he’s actually died.

“I had to be a dead body.

“So there was a certain amount of filming that had to be done.

“I’m bloody good at playing a dead body. It was some of my best work.”